Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By : Richard Blum, Christine Bresnahan
Book Image

Linux Command Line and Shell Scripting Bible - Third Edition

By: Richard Blum, Christine Bresnahan

Overview of this book

The Linux command line enables you to type specific shell commands directly into the system to manipulate files and query system resources. Command line statements can be combined into short programs called shell scripts, a practice increasing in popularity due to its usefulness in automation. Linux is a robust system with tremendous potential, and Linux Command Line and Shell Scripting Bible opens the door to new possibilities. Linux Command Line and Shell Scripting Bible is your essential Linux guide. It contains new functional examples that are fully updated to align with the latest Linux features. Beginning with command line fundamentals, the book moves into shell scripting and shows you the practical application of commands in automating frequently performed functions. This book is a complete guide providing detailed instruction and expert advice working within this aspect of Linux. Whether used as a tutorial or as a quick reference, this book contains information that every Linux user should know.
Table of Contents (34 chapters)
Part I: The Linux Command Line
Part II: Shell Scripting Basics
Part III: Advanced Shell Scripting
Part IV: Creating Practical Scripts
End User License Agreement

Using a MySQL Database

One of the problems with shell scripts is persistent data. You can store all the information you want in your shell script variables, but at the end of the script, the variables just go away. Sometimes, you'd like for your scripts to be able to store data that you can use later.

In the old days, to store and retrieve data from a shell script required creating a file, reading data from the file, parsing the data, and then saving the data back into the file. Searching for data in the file meant reading every record in the file to look for your data. Nowadays with databases being all the rage, it's a snap to interface your shell scripts with professional-quality open source databases. Currently, the most popular open source database used in the Linux world is MySQL. Its popularity has grown as a part of the Linux-Apache-MySQL-PHP (LAMP) server environment, which many Internet web servers use for hosting online stores, blogs, and applications.

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